Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 1281: Which of the following statements give the TRUE difference between evaporation and boiling? i. Evaporation occurs at all temperatures while boiling occurs at a fixed temperature for a given pressure. ii. Evaporation is a surface phenomenon while boiling is an interior phenomenon. iii. Evaporation is affected by surface area while boiling is not. Options:
  A) i and ii only
  B) i and iii only
  C) ii and iii only
  D) i, ii, iii.
  Show Answer
  The correct answer is D .
• Question 1282:

  

  A body of mass 40kg is being dragged along the floor by a rope inclined at 60 degrees to the horizontal. The frictional force between the box and the floor is 100N and the tension on the rope is 300N. How much work is done by dragging the box for a distance of 4m

  Options:
  A) 680J
  B) 400J
  C) 200J
  D) 100J
  Show Answer
  The correct answer is C .
• Question 1283: Mercury is suitable as a barometric fluid because it Options:
  A) expands uniformly
  B) is opaque
  C) is several times denser than water
  D) is a good conductor of heat
  Show Answer
  The correct answer is C .
• Question 1284: In 24 days a radioactive isotope decreases in mass from 64g to 2g. What is the half life of the radioactive material Options:
  A) 0.75 days
  B) 2.58 days
  C) 4 days
  D) 4.80 days
  E) 6 days
  Show Answer
  The correct answer is D .
• Question 1285:

  A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms${}^{-1}$ from the top of a tower 10m high. Neglecting air resistance, its total energyjust before hitting the ground is? (Take g = 10ms${}^{-2}$)

  Options:
  A) 5J
  B) 10J
  C) 15J
  D) 20J
  Show Answer
  The correct answer is C .
• Question 1286: The angle of deviation of light of various colours passing through a triangular prism increases in the order Options:
  A) red → green → blue
  B) green → violet → blue
  C) blue → red → green
  D) blue → green → red
  Show Answer
  The correct answer is A .
• Question 1287: Why is it impossible for the lines of force of an electric field to cross one another? Options:
  A) like charges repel each other
  B) a charged particle is deflected by an eletric field
  C) like charges are arranged on the same line of force
  D) a positively charged particle can travel in only one direction at any time
  E) none of these is correct
  Show Answer
  The correct answer is D .
• Question 1288:

  I. Wavelength

  II. Medium of propagation

  III. Wave velocity

  IV. Frequency

  V. Energy

  Which of the above are used for characterizing waves?

  Options:
  A) I, II and V
  B) I and IV
  C) I, III and IV
  D) III, IV and V
  Show Answer
  The correct answer is C .
• Question 1289: The volume of a given mass of gas is 40cm³ at 27° C. What is its volume at 90° C if its pressure remains constant? Options:
  A) 32.84cm³
  B) 40.02cm³
  C) 48.40cm³
  D) 57.44cm³
  E) 72.84cm³
  Show Answer
  The correct answer is C .
• Question 1290:

  ²³₁₁Na + Proton → ^p_qX + alpha particle

  What are the values of p and q respectively in the equation above?

  Options:
  A) 10 and 20
  B) 12 and 24
  C) 20 and 10
  D) 24 and 12
  Show Answer
  The correct answer is C .